I can confirm roughly 2 leg/hr. I got 2 legs within the first 15 mins, then nothing for the next 60. But RNG is RNG and I only tested for 1.25 hrs total.
Overall decent run, mind numbingly boring as others have stated but its really easy to do and requires no gear. Doing it on a DH is easy but with Vault but I will try Warzechians as well.
Only annoying part is reloading the game everytime... I can accomplish roughly 45 runs per hour as well.
Also this route provides a ton of gems and whites off wpn racks which may be useful for crafting if you need it.